Performance analysis of a jointly optimal BPSK receiver in cochannel interference

A jointly optimal detection scheme for a binary phase shift keying signal in the presence of a cochannel interferer and additive white Gaussian noise has been recently reported. The average error rate performance of this detection scheme was determined by extensive simulation. This paper develops an analytical solution for the average error rate performance of this jointly optimal detection scheme. An interesting characteristic of the solution is that it takes different analytical forms depending on the region of signal-to-interference ratio. These regions depend, in turn, on the phase difference between the desired signal and the interference signal. The analytical solution is exact and has excellent agreement with simulation results. These results show that this jointly optimal detection scheme can have good performance at both small and large values of signal-to-interference ratio.